Recorder



C. H. AU

Feb. 15, 1938.

RECORDER 'Filed April 7 1933 8 Sheets-Sheet l Feb. ,15, 193s. C, AU .2,108,037l

RECORDER Filed Apri1`7, 1933 8 Sheets-Sheet 2 Feb. 15, 1931s.- c. H. AU 2,108,037

RECORDER Filed April 7, 1933 8 Sheets-Sheet 3 v Kir/g 'j j@ 5' )HH IUHH 4 ...'Uw". J2@ i "f5 I7 v wy "@03@\ a1/ L zdf 56 l y, 55 i; 1.55

59 iIIIIlI C. H. AU

RECORDER Feb. 15, 1938.

Filed Apr'il ,7, 192.3 8 sheets-sheet 4 wl Arf :555.52.25

1 RECORDER Filed April 7, 1953 8 sheets-sheet s a? J21 ya J 12.5 2l

l@ i f /Jzdy J 4 7 v Z -I e?" 12J 1o a() 126' J5 4/ E .f M 5' Q J2;

3 I, um n Il 6]?5121 g d@ 122 v 'M l" t 10.5 i a j f E f5 En@ 92 i 32 56 2.9 y .l Il l 15.6

l 15 y I 'Ull@ Q I H l LW i Y :van *www l J5; 5L l 1kb-15,1938.y 'C HAU l 2,108,031

.155 J l E y 5 9 Feb.V 15, 1938. c, H, AU 2,108,037

RECORDER Filed April T, 1933 8 Sheets-Sheet 6 Feb. 15, 1938.

c. H. Au 2,108,037

-RzcoRDER Filed April '7, 1935 8 Sheets-Sheet 7 Feb.. 15, 193s. c, H, AU l2,108,037

RECORDER Filed April 7, "193s 8 Smets-sheet e Patented Feb. 15, 1938 PATENT OFFICE RECORDER Carl Il. Au; Washington, D. C. Application April 7, 1933, serial No. 664,992

4 Claims.

The invention relates to recorders for recording a variable force or movement, such for ex-V ample, as the rise or fall of water stages.

An object of the invention is to provide a re-4 corder wherein the record sheet is 'fed by a'timecontrolled actuating mechanism, and wherein a stylograph forming a continuous record line on the record sheet is moved at an angle tothe path of travel of the record sheet at predetermined with an auxiliary stylograph making a continuous line on the record' sheet, which auxiliary stylograph is moved at an angle to the travel of the record sheet to offset the record line whenI the carriage isrreversed by a continuous ,movement of the drum in the same direction.

These and other objects will in part be obvious and will in part be hereinafter more fully dis" closed.

In the drawings which show by way of illustration one embodiment of the invention- Figure 1 is a view partly, in vertical section and partly in side elevation showing a recorder embodying the improvements, certain parts of the recording mechanism being omitted so as to show more clearly the sheet feeding mechanism;

Fig. 2 is a horizontal sectional view through the recorder, said view being taken above the mechanism therein so as to show the record sheet and the stylograph associated therewith in plan;

Fig. 3 is a vertical transverse sectional view through the recorder on the line 3--3 of Fig. 2;

Fig. 4 is a detail on an enlarged scale and partly in section showing the feed roller engaging and driving the record sheet;

Fig. 5 is a sectional view through the receiw ing roll for the record sheet taken 'centrally thereof;

Fig. 6 is a view partly in perspective and partly in section showing the locking mechanism for preventing movement of the paper feed by the actuating mechanism when the clock or timing device is removed;

Fig. 'I is a face view .of the control disk which moves the stylograph. recording time intervals on the sheet;

Fig. 8 is a Sectional view on the line 8 8 of Fig. 7;

Fig. 9 is a View partly in side elevation and partly in section of the recorder, and showing in elevation the mechanism within the recorder, omitting the receiving roll, the view being taken from the side oi the recorder' adjacent the control drum;

Fig. 10 is a vertical sectional view through the recorder on the line lili0 of Fig. 2;

Fig. 11 is a view partly in vertical section and partly in sideelevation, showing the means for reversing the travel of the carriage while said control drum continues to move in the same direction; I

Fig. 12 is a horizontal view-through the carriage carrying the stylograph producing the record of the variable'on the record sheet;

Fig. 13 is a view in perspective showing the means for supporting and operating the stylograph which records the time intervals on the record sheet;

Fig. 14 isa view in perspective showing the supporting and operating means for the time interval recording stylograph, said parts being separated to more clearly show their structure;

Fig. 15 is a perspective view of the supporting means and operating cam controlling the stylograph which, indicates whether the record line of the variable on the record sheet is formed by a reversal of the actuating drum or by a reversal of the carriage while the drum is moving in the same direction;

Fig. 16 is an end view of the recorder with the cover plates removed so as to show the timing device and the transmission gears for operating the control drum;

Fig. 17 is an end View of the recorder showing the actuating mechanism and the Winding means therefor, also showing the float-controlled driving wheel for the control drum;

Fig. 18 is a sectional view through the casing showing the manner of attaching theclock or timing device thereto;

Fig. 19 is a sectional view through the supporting post attached to the clock or timing means'and the clamping devices carried by the casing which secure the timing means in place;

Fig. 20 is a plan view of a portion of the record sheet; I

Fig. 21 is a sectional view through the receiving roll for the record 'sheet showing the means for supporting and rotating the same;

Fig. 22 is a sectional view through the actuating drum for the actuating shaft showing the on to a receivirg sleeve ratchet means for connecting the sections of the drum, and

Fig. 23 is a sectional view through the cable Wheel and the means for supporting the same which operates the control drum.

The recorder includes a casing in which is mounted a stock roll having a record sheet wound thereon. This record sheet is transferred to a receiving roll by a feeding mechanism engaging the sheet between the stock roll and the receiving roll. The feeding mechanism includes a roll driven by a time-controlled actuating mechanism, and this roll engaging the sheet is so constructed that the diameter thereof may be varied manually for varying the speed of the sheet without requiring any change in the speed of the actuating mechanism driving the sheet. Associated with the actuating means driving the sheet is a stylograph which produces a continuous line on the record sheet, extending lengthwise of the sheet, and associated with this stylograph is a mechanism including a control cam which causes the stylograph to move at an angle to the direction of travel of the sheet at predetermined regular time intervals. A stylograph mounted on the' traveling carriage is moved across the sheet for producing a record line thereon, and the travel of the carriage is determined by the control drum actuated in the present embodiment of the invention, by a float, which rises and fails with the water stage. The control drum has associated therewith mechanism for reversing the travel of the carriage while the control drum is moving in the same direction. Associated with this recording stylograph is an auxiliary stylograph which forms a line on the record sheet, and the auxiliary stylograph is controlled by acam which in turn is driven by the control drum. The cam is so shaped and timed as to o'set the record line produced by the auxiliary stylograph, when the carriage is reversed by. a continuous movement of the drum in the same direction.

It is thought that the invention will be better understood by a detail description of the illustrated embodiment thereof. The recorder includes a supporting base I, shown as mounted on supporting legs 2-2. Attached to the base are end members 3 and I. The record'sheet is indicated at I. This record sheet is wound onashaftlwhichissupportedinacasingby pivot .posts I and 8. one of which is yleldingly mounted. The record sheet passes under and partly 'around a shaft l having spaced flanges IB-Is forming frictional driving rollers for winding the sheet on to the receiving shaft. The shaft l is mounted in arms II-II which are pivoted to the end members of the recorder, and the movement of the arms Il in a clockwise direction as viewed in Fig. 3, through the weight of the shaft l is limited through the contact of the paper with the feed roll I2. This shaft servesasapresserrollcausingthesheettobc gripped by the feed roll. The sheet is wound Il. This sleeve. as

`showninllig.5ofthedrawings,isprovidedwith a radial slot Il. and is also provided vwith a transverse kerf Il leading from one side wall of the slot Il. This provides an upltanding shoulder at the other side of the lslot which lids the operator in the inserting ofthe end of the record sheet `through the slot for clamping the record sheet to the winding sleeve.

This sleeve Il on which the sheet is'wound iscsrriedbyashaft Ilprovidedwithtnmniom Ila, Ila which are of slightly less diameter than the inner diameter of the sleeve, so that the sleeve rests on the shaft and is driven by friction when the shaft is turned. The shaft I6 is also provided with rollers Il, Il. The shaft is mounted in arms Il, Il which are pivoted to the end members of the recorder, and it is the weight of the shaft II, the sleeve Il and the paper wound on the sleeve I3 that bears the rollers Il, I 'I downward into frictional gripping contact with the rollers II), III, and thus it is that the receiving sleeve is frictionally driven for winding the record sheet thereon. The rollers I1 and Il are so proportioned in diameter as to drive the sleeve I3 so as to wind the sheet firmly on the sleeve, but the speed of movement of the sleeve will decrease as the size of the roll increases, which is permitted by the slippage in the frictional driving contact between the parts. The feeding roll I2 is shown in detail in Fig. 4. Said feeding roll is carried by a sleeve member I8, which sleeve member is fixed to a shaft 2l. The sleeve and the roll are provided with a series of slots 2i extending all the way through the sleeve and dividing the roll I2 into separate sections supported by the integral end portion of the sleeve I9. Also mounted on the shaft 2l is a control collar 22 which has/.a tapered face 23 engaging the inner tapered face 2l on the sleeve. The shaft 20 is threaded as indicated at 2B. The collar 22 is also provided with a thread engaging this threaded portion of the shaft. When the collar is turned on the shaft 2l so as to move it to the left, as viewed in Fig. 4. it will expand the feed roll i2 and give thereto a greater diameter and a greater circumference. n the other hand, when the collar 22 is moved in the opposite direction, the roll will be decreased in diameter and in circumference through the spring of the metal holding -said sleeve firmly contacting with said collar.

As noted above, th shaft 0 serves as a presser roll and through its weight and the weight of the parts supported thereby, will hold the record sheet in contact with this feed roll I2, as the feed roll I2 is the sole means limiting the downward bodily movement of the shaft l. The rollers Il which transmit the movement of the shaft I to the rollers I l do not engage the shaft 2l. 'Ihe shaft 2l is mounted in bearings in the end members 3 and 4. This shaft extends through the end member l and carries a gear 2lthereon. 'Ihisgearislocatedinachamber 21 formed in the end member and closed by a cover plate 2l.

Attached to the cover plate 281s a bracket 20 in which is mounted s drum Il. The drum ll has a projecting sleeve Il.: which receives the end of the shaft 2l. lThe shaft 2l is slsbbed'at one side thereof, as indicated at 2.a in Pigs. 1 and 22. The sleeve It: carries a cross pin 2lb which enters and crosses the opening receiving the end of the shaft and this Din contacts with .theslsbbedfaceoftheshsftsoastoprevent rotation of the shaft relative to the sleeve. By this construction the drum may be readily conncctedtotheshaftandtheshsftcndwillserve ss s. supporting bearing for the drum. The dnxm csrriesspinli towhichacsbleilamsybesttsched, and the cable carries s weight IIb. This drum is made in two sections. The inner section isvindicatod in the drawings at "a, (see Figures 1. 2 and 22) and itis this inner section which is connectedto the shaft 2l. The outer section of the connected to the inner section thereof by a ratchet mechanism which includes a pawl 30D adapted to engage projections 30o, 30e on the inner section of the drum. A spring 30d engages the tail end of the pawl of the ratchet and normally holds it positioned so that it engages the projections 30e. Through this ratchet mechanism, when the drum is turned in one direction, it will turn the shaft, and when the shaft is stationary, the drum may be turned in the opposite direction for the purpose of winding the cable which operates the drum. Surrounding the outer section of the drum is a ring 30e having an opening therethrough. The pawl 30h is provided with a projecting portion which extends into said opening when the pawl is in operative position for engagement with the projections 30C. By turning this ring relative to the outer section of the drum, the pawl will be forced to a position so that it will not contact with the projections 30e. This provides a means whereby the outer section of the drum may be completely released from the inner section and turned when desired. A crank 32 is attached to the outer section for turning the same to raise the weight,

and the weight as it is moved downward by gravity, turns the drum and thus actuates the shaft 20. 'I'his gravity actuating mechanism is of the usual type, and further description thereof is not thought necessary.

The gear 26 on the shaft 20 meshes with a gear 33 carried by a shaft 34 (see Figures 2 and 17). This shaft 34 extends from one end member to the other. The right-hand end of the shaft 34, as viewed in Fig. 2, is mounted in a bearing, while the left-hand end passes freely through an opening in the end member. Attached to the end member 4 is a clock 35. The escapement shaft 36 of the clock carries a crosshead 31 and a bar 38 fixed to the shaft 34 rigidly carries pins 39, 39 which engage openings in the crosshead 31. When the clock is in place, the left-hand end of the shaft 34 is supported through this rigid connection with the crosshead 31. This produces a construction wherein the escapement shaft of the clock and the control shaft 34 for timing the actuating mechanism will be properly connected so as to turn freely in the supporting bearings therefor.

The shaft 20 is provided with a ratchet wheel 40. A pawl 4I is moved znto engagement with the ratchet wheel by a spring 42. A lever 43 pivoted at 44 overiies the tail 45 of the pawl 4I. Enclosing the clock or timing device 35 is a casing 46. This casing is secured to the end member 4 by suitable screws, one of which is indicated at 41 in Fig. 6 of the drawings. When this screw is threaded through the end memberfor attaching the casing 46 thereto, the lever 43 will be swung on its pivot into contact with the tail of the' pawl 4I, and this will move the pawl out of engagement with the ratchet wheel 40. When, however, the screw 41 is removed', then the pawl is released and will move into engagement with the 'so that the feed of the record sheet Will continue. The feed roll i2 can only be moved through the actuating mechanism under the control of the escapement of the clock. When the clock is removed, then this roll is locked from movement in a direction for feeding the paper by the mechanism `iust described.

The clock is provided (Figures 1, 2, 18 and 19) with three supporting posts 48, 49 and 50. These posts are rigidly attached to the clock and each is provided with a reduced projecting pin portion adapted to engage a similar shaped recess or opening in the end member 4. On each post is a head 52 forming a right angle shoulder with the post. Attached to the end member 4 is a supporting screw 53. This screw is rigidly secured to the end member by a lock nut 54. There is a clamping member 55 threaded on the screw which can be turned by hand. There is a cross bar 56 havinga free connection with the screw and pressed yieldingly against the clamping member by a spring 51. There is a similar supporting screw 53a having' a clamping member 55a, a cross bar 56a, and a spring. When the posts of the clock are placed in the recesses in the end member 4, then the cross bars 56 and 56a may be placed so that the ends thereof will contact with the heads 52 on the posts. When the clamping members 55 and 55a are turned in a clockwise direction asviewed in Fig. 19, these cross bars -will be forced against the shoulders on the heads 52 and cause the posts to be firmly clamped against the end member 4.

In Fig. l20 of the drawings, there is shown a portion of a record sheet of the usual character. Said record sheet is in the form of a long strip of section paper, the lines of which are of equal unit .distances apart. The distances between the lines running lengthwise of the record sheet may be utilized as indicating the variations of the variable force or movement, as for example, the extent of the rise and fall of the water stage. The lines running transversely across the record sheet may be used for indieating time intervals. The recorder is provided with a stylograph indicated at 59, which makes the record line indicated at a in Fig. 20 of the drawings. It is also provided with a stylograph 60 which makes the record line b on the record sheet, as vshown in Fig. 20. The recorder is further provided with a stylograph 6I which makes the record line c as shown in Fig. 20. The purpose of these stylographs will now be described more in detail, and the mechanism for operating the same. The stylograph 6U is used for the purpose of indicating time intervals on the record sheet. The means for mounting and operating the same is shown in detail in Figures 13 and 14 of the drawings. The stylograph 60 is mounted in a carrying arm 62. This arm has yielding fingers projecting upwardly and spaced from each other, in which the stylograph is removably mounted. The arm is pivoted at 63 to a supporting bracket 64. The arm has a slot 65 therein and a screw 66 passing through the slot and threaded into the bracket serves as a means to permit the arm to be adjusted. The bracket has a depending member 61 with the lower end portion bent at right angles and provided with an opening. A rod 8,8 extends through the opening in the depending member 61 and in the supporting bracket 64, and said bracket has a limited movement lengthwise of the rod. Attached to the rod is a supporting arm 69 car-I rying a pin which engages a notched portion 1| in the bracket 64.

When it is desired to'swing the stylograph away from the record sheet, the bracket may be raised to lift the notch 1I from engagement with the pin 10 and then the bracket can be swung on the rod 58. When, however, the bracket is in the position shown in Fig. 13, itis fixed to the rod 58, and any turning movements imparted to the rod, will be in turn imparted to the stylograph. This rod is mounted in a bearing 12 attached to the supporting plate 13 which in turn is carried by the end member 4. There is a bearing member 14 at the upper end of this plate. Mounted for rotation in a bearing (Fig. 8) carried by the plate 13 is a disk 15 carrying one or more cam projections 10. The cam projection 15 is in the form of a pin inserted in an opening in the disk 15. The pin projects beyond the face of the disk and has a cam face. Attached to the rod 68 is an arm 11 having a cam-shaped end 18 which is adapted to engage these cam projections 15 as the disk 15 rotates. A spring 18 surrounding the rod 58 and attached to the upper bearing member 14 serves as a means for yieldingly holding the arm 11 in contact with the disk 15. Secured to the disk 15 is a pinion 00, shown in detail in Fig. 8. The pinion and the disk 15 are mounted for free rotation on the shaft 80a, see Figs. 7 and 8. This pinion meshes with a pinion 8| on the shaft 02. The shaft 02 extends across one end of the recorder to the other, and carries a pinion 03. The pinion 02 meshes with a pinion 04 on the shaft 34. `This shaft 34, as has been described above, is operated by an actuating mechanism and is connected to the escapement mechanism Aof the clock, so that it is the timing shaft of the paper feed.

The gears are so proportioned that the control.

disk 15 will be given one rotation every twentyfour hours. It may be driven at a different timing, if desired, but whatever the selected timing may be, it is controlled by the clock.

Referring to Fig. 8, it will be noted that the control disk 15 lies between the pinion 00 and the threaded sleeve having a knurled head 86. There is 'also a clamping washer 05a bef tween the sleeve and the disk 15. By turning this sleeve in the proper direction, the disk 15 may be released from its connection to the pinion 80. This permits an adjustment of the disk. The disk is preferably provided with dial figures indicating the hours of the day, and associated with the disk is a gauge plate 81 which is fixed to the supporting plate 13. This gauge plate has a zero line thereon to aid in the proper setting of the disk 15. The stylograph 80 makes a continuous line on the record sheet as indicated at b in Fig. 20 of the drawings. When this projecting portion 16 passes beneath the cam end of the arm 11, it will, however, givea movement to the supporting arm for the stylograph 50, so that it is lgiven a movement at an angle to the direction of travel of the sheet, and this will produce an angular bearing on the record line b as indicated at b'. This indicates a time interval, and by adjusting the disk it may indicate any desired time interval during the twenty-four hour period. It is understood that this control disk may have attached thereto projecting portions at any desired time intervals, from one hour intervals to two hour intervals, and so on to twenty-four hour intervals, just as desired. Each time a projecting portion passes the arm, 11, it will make a time interval indication such as indicated at b. These time intervals may be used to determine the proper speed of the record sheet. If the paper is sectioned so that there are certain heavy lines extending transversely thereacross, indicating the time intervals which are to be recorded, and it is shown that these time intervals are out of register with the lines, they can be shifted so as to bring them into register with any one of the section lines on the paper by shifting the disk 15 and the feed of the paper can be varied without changing the speed of the clock by enlarging or decreasing the size of the feed roll through the means which has been described above. This provides a very simple means whereby the time interval indicating stylograph and the paper feeding means may both be con-- trolled by the same clock and the feed of the paper varied without changing the timing of the clock.

The stylograph 59 is carried by a supporting arm 05. This arm is fixed to a shaft 08 mounted in a supporting plate 80 attached to a carriage 8|. The carriage 8| is provided with wheels 82, 82 grooved so as to engage a supporting rail 8l which extends from one end member to the other and is secured thereto so as to form a rigid supporting rail on which the carriage travels. The carriage has an arm 94 carrying a wheel 85 which bears on a rail 85 likewise extending from one end member to the other and fixed thereto. 'I'he carriage includes a center block 81 and side plates 80 and 88. There is ashaft |00 passing through the plates and the block, and also pins |0| and |02 which pass through the plates at the ends of the block. There are bolts |03, |03 which pass through these plates at a distance from the center block. 'I'he wheels 82, 82 have tapered end members engaging suitable bearings in these plates and by tightening or loosening the bolts |03, the wheels will be properly centered and held in their bearings and run freely therein.

'Ihe carriage is moved back and forth transversely of the direction of travel of the record sheet by the control drum |04. This control drum, asshown more clearly in Fig. 9, is provided with two spiral grooves or slots |05 and |05. These spiral grooves are oppositely wound and cross each other, and they meet for crossing at the ends of the drum. The two ends of the drum are similar in construction, and the construction at one end only will be-described, similar reference letters being placed to indicate similar parts at the other end of the drum. The drum is provided with a recess |01, and the spiral grooves or slots open into this recess |01. On the shaft forming a part of the drum is a cam member |00 having a cam face |08. I'he shaft |00 on the carriage is provided with an actuating boat ||0. The shaft is free to turn in the carriage so that the boat may shift its angular position. This boat extends into a spiral drum turns, it will force the carriage by means of the actuating boat to move along its supporting rail 83. The pin |01 projects beyond the plate 98 and cooperates with the cam face |08. If the carriage is moving to the left as viewed in Fig. 9, the actuating boat will pass out of the slot as the pin |0| contacts with the cam face |09 and moves along the same. The boat is completely out of the slot, as shown in Fig. l1, when the pin reaches its extreme movement along the Cam face |08. It is the actuating boat that propels the pin along the cam face |08 to the position shown in Fig. l1, and then itis the cam face |08 that reverses the movement of the carriage, forcing the pin |0| to the right as viewed in this figure, and this will cause the actuating boat to turn and pass into the slot |05. It is the groove or slot, and as the pin |02 that brings about the reversal of the movement of the carriage when it reaches the other end of the drum. From the above it will be noted that the carriage will be moved by the rotation of the control drum, and as long as the drum continues to rotate in the same direction, the carriage will move first one way across the drum, be reversed, and then move the other way across the drum. Also at 4any time the drum may stop and reverse its movement, and this likewise will reverse the movement of the carriage. The drum shaft extends through the end member 4 and carries a pinion I|| on the outer end thereof. This pinion meshes with a pinion I2 on a shaft H3. The shaft H3 extends through both end members and carries a drum or cable wheel lit. A cable H5 extends-.about this cable wheel or drum and carries at one end thereof a weight I|5a, and at the other end thereof a float I I5b which is so weighted as to float 4in the water and remain at the surface thereof, so that when the Water stage rises, the oat will be raised, allowing the weight to move downward and the cable wheel to be rotated. When, however, the float' moves downward, due to the drop or fall in the water level, then the cable wheel will be rotated in the opposite direction. The purpose of the pinions III and H2 is to vary the speed 0f actuation of the drum so that the travel of the carriage will make the desired graph record on the record sheet that is suitable to the extremes in the variation of the water stage being recorded. These pinions can readily be interchanged for varying the speed of the drum relative tothe speed of the shaft to which the cable wheel is attached.

From the above it will be apparent that the graph record will be made on the recording sheet which indicates the rise and fall of the water stage. Let us assume that the stylograph is moving in the direction of the arrow :t in Fig. 20, when the water stage is rising, and that when the stylograph reaches the side edge of the record sheet, the Water stage continues to rise and the drum continues to rotate in the same direction.

The record line will then be reversed, and theA portion thereof indicated at a does not indicate a fall in the Water stage, but a continued rising of the water stage. In order to indicate on the record sheet that this record line a is produced by a continued rising of the water stage instead of a fall in the water stage, the stylograph 6I has been provided which makes the record line c on the record sheet. This stylograph 6| is adjustably carried by a supporting bracket H6. The supporting bracket H6 is mounted on an arm I|'|. The arm Ill is bent upwardly at Illa and thence laterally at iilb so as to provide spaced vbearings engaging the shaft I I8, see Fig. 15. Also attached to this shaft IIB is an arm H9 carrying a roller |20 adapted to contact with a control wheel |2I. A spring |22 swings the arm so that it contacts with the side face I22" of this Wheel I2|. The wheel I2| has a raised cam section |22 which extends throughout 180 of the circumference of the wheel (Fig. 10). The ends |23 of this section |22 are inclined so that the roller will freely run from one section on to the other. The roller bears on the portion |22 when the boat I I is in one groove of the drum and on the portion I 22" when the actuating boat is in the other groove. The actuating boat moves along one of the grooves in the drumand into the other groove as long as the drum is continuing to rotate in the same direction, and when the directlons reversed, then the actuating boat will reverse its direction of movement and again move from one groove into the other Just as long as the drum is continuing to move in this same reversed direction. This wheel I2| is a gear wheel and has teeth thereon meshing with a pinion |24 carried by a shaft |25 (see Figs.,2, 9, 10 and 15). The shaft |25 carries a gear wheel |26, and this gear wheel |26 meshes with a gear wheel |21 attached to the shaft carrying the control drum. Thus it is that the wheel I2| is moved in timing with the drum and makes one complete rotation for a movement of the carriage from one end of the drum to the other end thereof and back to the first end of the drum.

Referring again to Fig. 10, and also to 20 showing the record sheet. In Fig. 20 the portions of the record at A, A' and A" indicate a rise of the water when the stylograph 59 is moving to the right of the paper. a, a', a" and a" indicate a rise of the water when the stylograph 59 is moving to the left, that is, the boat is in the other groove. cf Water when the stylograph is moving -to the left and d, d and d indicate a fall of water when the stylograph 59 is moving to the right. Points r, r', 1"', r'" and r"" are reversing points of the carriage when the boat IIUv passes from one groove to the other which is shown on the record by the offsetting of the record line c. The points h, h', and h" show a rev rsal of the stylograph due to the water changing from a rising stage to a falling one, that is, a high point of the water. The points l, l and l show a reversal of the stylograph due to the water changing from a falling to a rising stage, that is, a low point of the water. Let us assume that the Wheel i2| is turning in a counter-clockwise direction and the water stage is rising. The stylograph is traveling in the direction of the arrow r: and is producing a record line A indicating a rise in the water stage. The carriage is approaching one end of the drum-and as the drum continues to rotate in the same direction because of the continued rise in the water stage, the wheel I2| also continues to move counter-clockwise, and as the car riage is reversed by the actuating boat passing into the other spiral groove, the roller passes off from the portion |22 down the incline |23 on to the portion |22, and this oifsets the record line c, as indicated at c. This oifset c in the record line c indicates that a reversal of the water stage record line at the edge end of the sheet was produced by the continued rising of the water stage. When the point h is reached, the Water stage begins to fall, and the carriage reverses its direc.

tion of motion and produces the record line d which is a falling of vthe water stage. Again, when the carriage reaches the end of the drum and the water stage continues to fall, the stylograph 59 will be reversed, but the drum will continue to move in the same direction, and this will cause the roller to pass up on to the section |22' and again shiftthe stylograph 6I so as to bring it back to the normal record line c. Thevportion D of the record line indicates a continued fall-in the water stage. At the point l the water stage begins to rise, as shown at A', and the carriage is reversed at r and produces a record line a', indicatlng a continued rise in the water stage. At the point h" the water stage reverses and begins to fall as along d'. 'I'he carriage moves to the end of the drum at l', but here the water stage happens to reverse at the end of travel of the carriage, and therefore thelboat will pass .back

Similarly D and D' indicate a fall Y into the same groove because the drum reverses. The roller being right at the incline |23 will pass along a portion thereof and then back on to the section |22", and this produces a slight jog c", but it does not indicate a change of boat from one groove to the other. Ihe record line following the carriage reversal point l' is the rising record line a". Following this is a falling record line d with a reversal r'" in the travel of the carriage produced by a continued falling of the water stage, as is indicated by the offsetting of the record line c. The water continues to fall along D to l", rises along A, continues to rise at carriage reversal at r" along a".

It is believed from the above it will be apparent that the record line c clearly indicates whether the reversal in the record line produced by the variable movement is brought about by a reversal of the carriage through a change in the direction of movement of the variable, or merely by the fact that the carriage has reached the end of the drum and must change its direction of motion in order to produce a record line on the sheet, while the drum continues in the same direction.

The carriage reciprocates back and forth between ilxed limits. The stylograph 60 recording the time intervals produces a normal record line having a fixed position relative to the limits of travel of the carriage, and it is offset from this normal line at predetermined timed intervals. The stylograph 6| producing the normal record line c also has a fixed position relative to the limits of movement of the carriage and relative to the normal position of the stylograph 90 producing the record line b. The stylograph producing the record line c ls shifted to produce an offset record line, but this offset line is also in a fixed position relative to the limits of travel oi the carriage. These record lines b and c may, therefore, be said to be xed baselines, and may be used as such in interpreting or making calculations from the record sheet. The record sheets are usually provided with base lines and unit lines from which calculations may be made. If the sheet expands or contracts during the production of the record, these record lines formed thereon cannot be related to the base lines which are printed on the paper with accuracy. If there is no expansion or contraction, then, of course, the record may be calculated from these base lines printed on the record sheet. The lines b and c produced by these stylographs 80 and 6| which are set at a fixed distance apart during the recording of the normal record lines b and c may be used as base lines to determine to what extent the paper is expanded or contracted, and thereby errors which might Aarise from the expansion or contraction of the paper rectified.

It is thought that the operation of the recorder will be obvious from the statements made in connection with the describing of the various features in detail. The stylograph 59 is moved back and forth across the record sheet by the rise and fall of the water stage and will reverse its movement at the end of the drum even though the water stage continues to rise. The stylograph 6| making a line on the record sheet will indicate the particular characteristic in the variable being recorded that caused the reversal of the graph. The stylograph 60 will make a line on the record sheet which, together with the record line made by the stylograph 6|, is helpful for calculations, but it will also make a record of time intervals on the record sheet, so that one can readily lnterpret from the record sheet the exact condition of the water stage at any time interval desired. 'Ihere are only two actuating mechanisms in the recorder; one is the actuating mechanism for the feed of the sheet and the movement of the stylograph recording the time intervals, and the other is the actuating mechanism controlled by the water stage which moves the carriage, positioning the stylograph carried thereby, and also which operates the stylograph producing the record line that indicates the characteristic of the variable, causing a reversal of movement of the carriage when it reaches the end of the control drum. The actuating mechanism for feeding the sheet is time-controlled, and this same time controlling mechanism operates the stylograph for producing a record of time intervals on the sheet. The feeding mechanism for the sheet permits an adjustment for changing the speed of travel of the sheet without changing the speed oi' the timing mechanism, and therefore, a change in the feed of the sheet does not, in any way, interfere with the proper operation of the stylograph recording time intervals.

The entire operating mechanism is housed and sealed within a casing solas to protect it from moisture. The clock although it is on the exterior of one of the end members, is housed within a casing. There is a cover plate |29 of sheet metal which is shaped to conform to the end members and which contacts therewith. This covei' plate is rigidly secured to a bar |29, which bar is placed on supporting brackets |30 having upstanding portions inclining away from the base of the recorder. There is a lug 3| carried by the end member which projects outwardly from the face of the end member. 'I'his bar |29 extends beyond the ends of the end members and is placed on the supporting brackets |30 and beneath the lugs |3I. Rods |32 made in sections so that they can be lengthened or shortened, are mounted in the depending flanges |33 of the base 'I'he rods are provided with hook ends |34 which may be turned so as to project upwardly and then placed against the bar |29. When so positioned, the upturned end |35 oi' the rod will extend up above a bar |33 which is also attached to the cover plate at the other side thereof. A clamping screw |31 is then turned against the bar |39 and will clamp the same firmly against the base I. Prior to the clamping of the bar firmly against the base, clamping members |39 carried by depending brackets |39 attached to the bar I 33, are brought against the under face of one of the flanges |33. 'Ihis will draw the cover plate tightly down into contact with the end members, and then the final clamping action of the screws |31 firmly holds the bars |29 and |30 against the base. These clamping screws enable a sealed connection to be made between the cover plate |28 and the end members and base, thus protecting all of the actuating mechanism and the record sheet from moisture. v

Having thus described theV invention, what I claim as new and desire to secure by Letters Patent, is

1. In a recorder having means for supporting and operating a record sheet, the combination of a carriage movable transversely across said sheet, a stylograph carried by the carriage and contacting with said sheet for producing a record line thereon, a control drinn for reciprocating said carriage, means associated with the control drum for reversing the movement of the carriage while said control drum is moving in the same direction, means for rotating said control drum responsive to the changes in a variable movement to be recorded, a second stylograph contacting with and producing a record line on said sheet, a control disk operatively connected to said drum and driven in synchronism therewith, means for supporting said last-named stylograph including an arm yiedingly moved into contact with said control disk, and a cam member on said control disk for shifting said second stylograph to oiset the record line made thereby when said carriage is reversed by a continued movement of the control drum in the same direction.

2. In a recorder having means for supporting and. operating a record sheet, the combination of a carriage mounted for movement transversely of the record sheet, a stylograph carried thereby, a control drum having kreverse spiral grooves formed therein extending from end to end of the drum and crossing each other, an actuating boat carried by said carriage and movable along the grooves in said drum when said drum is rotated, a pin mounted on said carriage at each side of said actuating boat, a reversing cam carried by the drum at each end thereof with which the pin at the adjacent end oi the carriage contacts vfor reversing the movements oi the carriage and the shifting of the actuating boat-from one spiral groove to the other while the drum continues to rotate in the same direction, and means responsive to a variable movement to be .recorded for rotating said drum.

3. In a recorder having means for supporting andi; operating a record sheet, the combination of a carriage mounted for movement transversely of the record sheet, a stylograph carried thereby, a

control drum having reverse spiral grooves formed therein extending'from end to end of the drum and crossing each other, an actuating boatcarpin mounted on said carriage at each side of saidV actuating boat, a reversing cam carried by the drum at each end thereof with which the pin at the adjacent end of the carriage contacts for yreversing the movements oi the carriage and the said last named record line when the carriage is reversed by' a continued movement oi the drum in the same direction.

4. In a water stage recorder having means for supporting and operating a record sheet, the combination of a carriage movable transversely across said' sheet, a stylograph carried thereby and contacting with the record sheet for produc-- ing a record line thereon, a control drum having reverse spiral grooves formed therein extending from end to end thereof and crossing each other, an actuating boat carried by said carriage and movable along one of said grooves and into the other for reversing the movement o the carriage while the drum continues to rotate in the same direction, a reversing cam disposed at the end of the drum and means mounted on the carriage and cooperating with said cam for causing the reversal of the same without lost motion while the drum continues to rotate in the same direction, means responsive to the variable water stage to be recorded for rotating said drum, a second stylograph contacting with and producing a .record line on the record sheet for indicating conditions causing reversal of the carriage, and means operating in synchronism with said drum for shifting said second stylograph to offset the recordline made thereby when the carriage is reversed by a continued movement of the control drum in the same direction.

CARL H. AU. 

